bates



May 10, 1927. 11 ,627,684

A. H. BATES LATCH FOR EMBOSSING MACHINES Filed Nov. 9, 1925 4 Sheets- Sheet l anoeutoz ay A. H. BATES LATCH FOR EMBOSSING MACHINES Filed Nov. 9, 1925 4 Sheets-Sheet 2 N 1% MN Suoenfoz I QWL; Queuing:

wzmm May 10 1927- A, H. BATES LATCH FOR EMBosme MACHINES Filed Nov. 9, 1925 4 She'ets-Sheet 3 m mm May 10 1927. 1,627,684

A. H. BATES LATCH FOR EMBOSSING MACHINES Filed No' v. 9, 1925 4 Sheets-Sheet 4 gnve'nkoz Patented May 10, 1927.

htzht i UNH'EQ fi'lA'l'iEg PATENT @FFMIE.

ALBERT H. BATES, 0F SHAKER HEIGHTS, OHIO, ASSIGNOR TO THE AMERICAN MUL- TIGRAPH COMPANY, OF CLEVELAND, 0331110, A CORPORATION OF OHIO.

LATCH FOR EMBOSSING MACHINES.

Application filed. November In certain types of embossing machines, a i set oi dies are provided corresponding to the by Patent 1,551,75 l to my assignee The- 'i'imerican lvfliultigraph Company) the carriage carries the dies, which are reciprocated in either direction from a central position of rest.

' lhe object of my invention is to provide a simple and eilicient latch movable with such a shittable carriage and adapted to coact with an actuated key lever to lock the carriage positively in the'engaged position and initiate the embossing operation. A feature of my latch is its positive action, avoiding possible failure from sticking of any parts.

I have illustrated my latch embodied in such embossing machine as is shown in The American lt lultigraph Companys patent mentioned, although the invention is not intended to be limited thereto. T he invention is lifereinatter more fully explained in connection with the drawings and its essential novel features are summarized in the claims.

In the drawings, Fig. 1 is a plan of'the multigraph embossing machine which may be equipped with my latch; Fig. 2 is a s1de elevation of such machine; Fig. 3 is a transverse vertical section of the embossing machine, showing my latch in front elevation; Fig. at is a detail oi the latch itself, being a vertical section in a plane parallel with Fig. 23; Fig. 5 is a horizontal section of the latch, in the plane indicated by the line 5-5 on Fig. l; Figs. 6 and 7 are vertical sections of the latch similar to Fig. 4 but with the parts in a different position; Fig. 8 is a vertical section of the latch at right angles to Figs. 4, 6 and '2' showing the parts after actuation llig. 9 is a view similar to Fig. 8

showing the parts in normal position; Fig.

10. is a. perspective of certain parts of the latch assembled.

For a better understanding of the latch, I

9, 1925. Serial N0. 67,784.

will first describe briefly the general nature ,ot' the embossing machine illustrated in Figs. 1, 2 and 3.

The embossing machine shown comprises a suitable bed 9, a transversely reciprocable die carrier 10, having individually movable male and female dies 11, a keyboard 12, and suitable mechanism controlled by the keyboard for positioning the die carrier and consequent upon such positioning automatically plunging the selected dies toward each other to emboss an intermediate strip of metal 13 which is ted from a suitable reel let and flanged at its edges by intermittently operated rolls 15. Such flanged strip passes along a supporting rail 16 behind a retaining rail 1?, both extending through an open longitudinal space in the die carrier. These rails are cut away at the central portion 18 where the selected dies operate to effect the embossing.

To reciprocate the die head of this Chisholm embossing machine, there are provided a pair of solenoids 2-0 operating on a common core bar 21 connected by a link and lever 22 with the die head, the solenoid on either side being energized whenever a key in the corresponding half of the keyboard is depressed. Fig. 1 indicates at 25 a pair of levers tor ClOSillg the solenoid switches when a key is depressed. Each of these levers carries a rod 26 overhanging the rear port-ions ot the hey levers and actuated thereby; The die carrier, thus shifted from its central position of rest, is stopped in selected positionby means of a stop positioned by an actuated key lever 28 (shown as the rear end of the key lever itself) which coacts with my latch, designated generally 30 and hereinafter described.

The engagement of the positioned die carrier with the latch locks the die carrier in position and raises a universal bar or rail '70, which by means oi lnk Ti and a bell crank '72 withdraws the rod 73 from a single-rotation clutch 74-. lhis clutch thus freed, clutches the continuously rotated main driving pulley 75 to the shaft T6, which carries a pair of crown cams, indicated at T7 in 2. which operate on the lower end ct in 4 termediately pivoted levers 78 and 79, which act to shove inwardlysuitable plungers female and male dies respectively.

(ill

' raised key lever.

abutment heads 41.

bank.

Following the embossing operation the plunging me'chanisrn returns to normal po sition, spring fingers 80 on the die head return the dies, the key returns the circuit to the energized solenoidis opened and thecarrier is returned to normal position under the influence of a compression spring 81 on either side of the carrier. During these return operations the strip is fed toward the left a distance of one character by means of the rolls 15. As shown one of these rolls carries a ratchet 82 operated by a pawl 83 on a suitable lever connected by a link 84 with arock arm 86 on the rock shaft 85,

i which also carries the die operating lever 78.

The mechanism for returning the key levers, shown in Fig. 2, comprises a hook 90 on the embossing lever 78, which on the return or outward stroke engages the upper end of a pivoted latch plate 91, the lower end of which extends beneath a tooth on a raised key lever. When this lower end is withdrawn the key lever is freed and the lever is suitably returned to positions Referring now to Figs. 3 to 9 inclusive, indicates the body of the latch, which vcomprises a hollowblock, shown as equipped with rollers 31 for guiding it along a suitable trackway and having in its back a vertical recess 32 into which extends a vertlcal rib (not shown) on the die head 10, whereby the latch partakes of the lateral movement of the die head. The rib and groove engagement however, allows the die head to be moved vertically (by means not shown) to change from one character on a die block to another in the same block.

The latch frame 30 carries a pair of slidabl mounted. stop bars 10, each having an Ls aped end 41 providing an abutment for engagingthe raised rear end of a key lever 28, and having a shank extending through the body and projecting beyond it. Surrounding this shank is a compression spring 43' adjusted in pressure by nuts 4 lVhen one solenoid 20 is energized by the depression ofa key, the die head and latch are moved ina direction toward that key until the corresponding. abutment 41 engages the This gently stops the movement of the die, as the spring 43 acts asa shock absorber.

Associated with each abutment is a supplemental abutment adapted to engage the same sideof .the key lever. As shown, this supplemental. abutment comprises a lever pivotally mounted ina recess in each of the normally projectingfromthe abutment toward the key levers in the corresponding When: the die headand latch are moved into-engagement with such key lever,

the toe 5l..on the corresponding lever 50 This lever has a toe 51,

lever is provided with an'extension 52 which in this rocking movement engages a cone sponding'toe 53 or 54 on a vertical sliding bar 55; This bar lies directly beneath the bail 70'andithus operates to raise ittowitlr draw the clutch-rod. and initiate the movement of the embossing mechanism.

The arms 52 on respective rocking members are located one at the front of its member and the other at the rear as shown in Fig. 5. By this means, I obtain ample ,clearancebetween the two abutments to allow space for movement to yieldingly absorb the blow when a key lever is impinged.

Mounted in the body 30 of the latch on opposite sides of the tripping levers 50, are a pair of locking blocks which are vertically slidable in the body, having upward extensions 61 occupying ways therein. Each tripping lever has secured to its upper end a leaf spring 63 which slides through an opening 64 in the extension 61 of the block. The tendency of this connection is to move the block 60 downwardly whenever the tripping lever 50 is rocked. The purpose of this is to place a positive blockbehind the key lever and prevent rebound resulting from the cushioned abutment already described.

When one of the. rockin levers engages til the key lever. it will imme iately rock and thus tend to lower the corresponding block 60. Accordingly this block will engage the top of the key lever before the same has traveled beyond the edge of the block, the

position of the parts being illustrated in the left hand portion of Fig. 6. The flexing of the leaf spring 64 provides for this and allows a continued movement of the trip .ping'lever. As the tripping lever completes its stroke, the abutment block will have moved clear of the key lever and will then come down on the far side thereof by means of the straightened leaf spring, as shown in the left hand portion of Fig. 7. Accordingly the key is positively locked between the abutment bar 41 and the locking block 60, as shown in the right hand portion of Fig. 1.

'lhevforward sliding of the abutment bar 40 carrying the tripping lever causes the leaf spring of the latter to slide correspondingly ,through the opening in the block extension 61, but engagement is maintained at all times. It will be seen, therefore, that the block 60 is moved downwardly positively behind the key lever as soon as the travel of thedie headhas moved this block beyond the key lever. This positive lowering of. the locking block prevents any danger of its sticking from lack of oil on its slideways;

It is-desirablethat the bar 55 release the bail 7O almostvas soon as it has raised it so that the--bail...may descend and the clutch releasing rod73 (under the influence of its lllll spring 95) return to position to intercept the clutch well before the clutch has completed a rotation. To effect this, I form the bar as shown in Figs. 8 and 9 with a shoulder 56 normally extending a short distance beneath the bail 70, and I make a slot 57 through the bar, the forward wall of which extends vertically and then inclined rearwardly as shown. A pin 58 carried by the latch body extends through this slot. By reason of the form of the slot, the bar 55 when moving upwardly retains its position beneath the bail until the bail has risen sufliciently to release the clutch; then the further upward movement of the bar by reason of the incline of the slot carries the upper end of the bar forwardly which withdraws the shoulder 56 from beneath the bail, whereupon the latter descends to normal position due to the spring on the clutch release rod.

To give the bar 55 a tendency to remain in its rearmost position, I have shown a spring 66 mounted in a recess in the front portion of a latch frame and adjusted by a screw 67, thus forcing a plunger 68 against a forward edge of the operating bar.

The conclusion of the operation of the machine releases the key lever and thus allows the tripping lever to rock whereupon a spring 59 anchored to the bar and to the latch body 30 restores the bar 55 to position. The same action of the spring 59 in restoring the bar also restores the tripping lever and the restoration of the latter restores the locking block to normal position.

It will be noticed that the spring 59 restoring the supplemental abutment 50, is much lighter than the spring 43 on the main abutment, so that in the stopping operation the supplemental abutment invariably performs its operationeven the shortest stroke of the die head moving it to its limit-after which the main abutment is moved a variable amount, dependent on the force ofthe blowof the die head.

It will be seen from the drawings and the description given that I have provided a compact duplex latching device mounted in a suitable housing adapted to be shifted as a unit with a traveling carriage. My latching device not only provides a pair of cushioned abutments adapted to coact with levers of two banks in a keyboard, but provides a corresponding pair of rebound preventors which are positively lowered into position i at the opposite sides of actuati ng key levers.

This same lowering movement of the rebound preventer is accompanied by a ra1s ing movement of the actuator 'for the un1 versal bar which controls the clutch to apply the power.

Such power when applied effects the embossing, or other operation to be performed, and at the conclusion thereof'releases the key lever, which drops into position, thus releasing the latch, thereupon the carriage together with the latch may return to normal position.

Having thus described my invention, I claim 1. The combination of a keyboard having finger keys, stopping members operated thereby respectively, a device shiftable transversely of said stopping members, a member shiftable with said device and adapted to coact with said key operated member, and a locking device normally out of position to engage said key operated member but under the control of said movable member moved into position to engage said key operated member.

2. The combination of a movable stopping member, a key for operating the same a shiftable carrier, a tripping device on the carrier adapted to coact with the key operated stopping member and a locking device on the carrier adapted to be moved under the control of the tripping device into coaction with the stopping member.

3. The combination of akeyboard having key levers, a carrier shiftable transversely of the key levers, a tripping lever on the carrier adapted to coact with one side of an actuated key lever, and a locking block moved by the tripping lever into engage ment with the opposite side of such key lever.

4. The combination of a stopping member, a movable carrier carriage, an abutment movable with the carriage and adapted to engage one side of such stopping member, a tripping device on the carriage adapted to engage the stopping member, and a locking device on the carriage adapted to be moved under the control of the tripping device into engagement with the other side of the stopping member.

' 5. The combination of a stopping member, a device shiftable transversely of said member, a cushioned abutment movable with said device, a tripper, both the cushioned abutment and said tripper being adapted to engage said member, and a locking device adapted to coact with said member and moved under the control of said tripper.

6. The combination of a row of stopping members, a carriage shiftable transversely of said members, a cushioned abutment mov able with the carriage, a tripping lever movable with the carriage, the cushioned abutment being adapted to engage an actuated stopping member and the tripping lever being operated at the same time, and a lockand cooperating with the actuated stopping member.

7. The combination of a key actuated stop, a device movable transversely thereof, an abutment movable with said device and mg member moved by the'tripping lever adapted to engage said stop, a tripping member'on the abutment movable relatively thereto, and a" locking device under-the control of the tripping member and adapted'to 'coact with the actuated stop.

8. The combination of a keyboard having key levers, a. carriage shiftable transversely thereof, a yielding abutment movable with the carriage and adapted to engage one side of an actuated key lever, a tripping device on the-abutment and a rebound preventor movableunder the control of thetripping device into engagement With the other side of such key lever.

9. The combination of a key operated member, a carriage shiftable transversely thereof, a tripping device movable Withthe carriage adapted to engage said member, a lockingdevice-adapted to engage said memher, and a yieldingconnectionadapted to transmit movement from the tripping device to thelocking device.

10. The combination of a keyboard having key levers, a carriage shiftable transversely thereof, atripping lever on the carriage adapted to. engage one side of an actuated key lever, a locking device-adapted to engage the other side of such key lever, anda yielding connection b'etWeen'the tripping lever and lockingdevice.

11. The combination of a keyboardhaving key levers, a carriage ,shiftable transversely thereof, a yielding abutment movable with thecarriage and adapted to engage one side of an actuated key lever, a tripping device movable with the carriage and adapted to engage the key lever and a locking device for the other side ofthe key lever under the control of the tripping device, said abutment being normally positioned by a comparatively heavy spring and said locking device by a comparatively light spring.

12. The combination of an actuatable stop, a carriage shiftable transversely thereof, a tripping lever movable with the carriage adapted to coact withone sideof said stop,

a sliding block on the carriage adapted to roact with the otherside of saidstop, and a leaf spring carried by the tripping lever and acting on the block.

13. The combination of a keyboard having key levers, a carriages'hiftable transversely thereof, a'yielding abutmentmovable with the carriage, a tripping lever mounted onthe abutment, a rebound preventor in the form of. a block 'slidably moi'i'nte'd 'in the carriage, and a spring connecting" the tripping lever with the rebound preventor.

14.. The combination-of an antuable nfember, ac arriage :shiftable transversely thereof, an abutment movable with the carriage and adapted to engage said membematrip- I ping member movably mounted on the abutment, a'normally disconnected: power device including; a clutch, means for releasing the clutch operated by thetripiping member.

15. The combination ofa' eyboard having-key levers, a'transversely shift-able caring the abutment, aftrippmgdevrce movably mounted on-the abutment andadapted to engage said key lever a comparatively light spring tending torestore the tripping device, and means for applying the power controlled by'the movement of said tripping device.

16. The combination of an actuatable member, a transversely movable carriage, mechanism for connecting power, and a tripping device sliiftable with thecarriage and adapted to be actuated by engagement with said member, and a lockmg. devioeadapted to engage said member, said tripping device performing the double function of causing thelocking device to move into positionand connectingthe power.

17 .The combination of a keyboard having key levers,-a carriage transversely movable, a clutch for applying power, mechanism for-releasing the-clutch, a tri ping levershiftable with the carriage and a apted to coactwith anactuated key leverand operating the clutch releasing mechanism, a locking device shiftable with. the carriage and adapted to meet with said actuated key lever, and a yielding connection between the tripping lever and the locking device.

18. The combination of a keyboard having key levers, a carriage shiftable transversely of the key levers, a yielding abutment movable with the carriage adapted to engagea key lever, a trippinglever pivotally mounted on the abutmentyasliding *block adapted to engage the opposite side of a key lever, a leafspring carried 'by the tripping lever and engagingthe sliding block, a source of power including a normally disconnected clutch and mechanism whereby the rocking ofthe tripping lever releases the clutch.

19. The combination of a keyboard having key levers divided into two banks, a

transversely reciprocable carriage, a pair of abutmentsvmovable with the carriage, a pair of tripping members on the abutments, and

.a pair of locking blocks movedfby the tripping memb'ers, each trippingv memberv and the corresponding locking block. being adapted tocoast with an actuated key lever.

20.. =lh e-- combination of a keyboard having key levers divided into two banks, a

-transversel'y;'shiftable eamiag'e, Ii -latch frame movable with the carriagepa, air'of yield- 'ing-abutrnents-on thelatcharame, a pair oftrippingmemberssappormd-b the latch frame and a peirof bloeksslida lyeguided in the latcli'frame and .to be moved amt-e control of:

into engaging; positionthe movement of the respective tripping members, each tripping member and the corresponding locking block being adapted to coact with an actuated key lever.

21. The combination of a keyboard having key levers divided into two banks, a transversely shiftable carriage, a pair of abutments movable with the carriage and adapted to engage actuatedkey levers of the respective banks, a pair of tripping levers adapted to engage the key levers on the same side as the abutments, a pair of latch blocks adapted to engage the opposite sides of such key levers, and yielding connections between the tripping levers and latch blocks.

22. The combination of a keyboard having key levers divided into two banks, a transversely reciprocable carriage, a latch frame movable with the carriage, a pair of yielding abutments carried by the latch frame, a pair of tripping levers pivotally mounted on the abutme nts, a pair of locking blocks slidably mounted in the latch frame, and a pair of leaf springs connected with the respective tripping levers and engaging the respective latch blocks, each tripping lever and the corresponding locking block being adapted to coact with a key lever.

23. The combination, with a set of actuatable members, a transversely shiftable carriage, an abutment movable laterally with the carriage, a tripping device movable laterally with the carriage, both the abutment and tripping device being adapted to engage an actuated member, a rebound preventor for the carriage and an actuating member both moved by the tripping device, and power applying mechanism controlled by said actuating member.

24. The combination of a keyboard and members actuated thereby, a transversely shiftable carriage having a latch frame movable transversely with it, a yielding abutment carried by the latch frame, a tripping lever pivoted on the abutment adapted to coact with one of the key actuated members, a bar on the latch frame moved by the tripping lever, and means for applying power moved by the bar.

25. The combination of a key actuated member, a transversely shiftable carriage, an abutment shiftable with the carriage adapted to engage such key ,actuated member, a tripping lever pivoted on the abutment and adapted to engage such key actuated member, a clutch, a universal bar for releasing the same, and means whereby the tripping lever actuates the universal bar.

26..The combination of a key lever, a transversely shiftable carriage, a yielding abutment movable with the carriage and adapted to engage a key lever, a tripping lever mounted on the abutment and moved when the key lever is engaged, a normally disconnected power device including aclutch,

a universal member for releasing the clutch, and means whereby the tripping lever 0perates the universal member.

27. The combination with a set of positionable stops, of a transversely movable carriage, a cushioned abutment thereon adapted to engage one side of a positioned stop, a locking block thereon adapted to engage the other side of such stop, a tripping lever movable with the carriage and adapted to be rocked when the abutment comes into engagement with a stop, an operating connection between the tripping lever and the locking block, a clutch, and a universal bar for operating the same adapted to be actuated by the tripping lever.

28. The combination of a keyboard having keys divided into two banks and having key levers, a carriage reciprocable from a central position of rest in either direction transversely of the key levers, a pair of cushioned abutments movable with the carriage and coacting with levers of the respective banks pair of tripping devices respec tively mounted on the abutments, an actuating member adapted to be moved by either tripping device, a universal bar adapted to be moved by the actuating member while the latter is in various positions, a clutch and means controlled by the universal bar for releasing the clutch.

29. The combination with a key lever, an automatic lock therefor, a shiftable carriage, a pivoted tripping lever movable with the carriage and adapted to engage a locked key lever, a locking member moved by the tripping lever into position to engage the locked key lever, a clutch, means for releasing the same under the control of the tripping lever, and means for releasing the key lever latch under the control of the clutch.

30. The combination with a reciprocating head having embossing dies, a set of positionable stops, a tripping lever movable with the die head and adapted to coact with an actuated stop, means actuated by the lever for latching the die head, a clutch, mechanism whereby the rocking of the tripping lever releases the clutch, and means for operating the embossing die actuated by the clutch.

31. The combination with a reciprocating head having embossing dies, a keyboard having keys corresponding to the dies, an abutment movable with the die head and adapted to coact with an actuated key lever, a trip ping lever movable with the die head and adapted to coact with an actuated key lever, a connection between the tripping lever and the abutment whereby said lever may move the abutment to active position a clutch, mechanism whereby the tripping lever rcleases the clutch, and means for operating the embossing die actuated by the clutch.

32. The combination of a keyboard having finger keys and key levers, a reciprocatingdie head movable transversely of the key levers and having dies corresponding to the keys, an abutment movabletransversely with the die head adapted to engage an actuated key lever, a trippingdevice movably mounted on the abutment,a clutch adapted to be released by the tripping device and mechanism actuated by the clutch for operating the 'dies.

33. The combination of a keyboard having key levers, an automatic latch for said lever when actuated, a transversely reciprocable the head having dies corresponding to the keys, a yielding abutment on the die head adapted to coact with one side of-a latched key lever, under the influence of a com aratively heavy spring, a tripping device asepted to coact with the same side of said key lever under the influence of a comparatively light spring, a universalbar adapted to be operated under the control of said tripping device, a clutch released by the universal bar, mechanism for operating the dies actuated by the clutch, and means for releasing the .key lever actuated by the return stroke of the die operating mechanism.

34. The combination ofa keyboard having key levers, an automatic lock for said levers when actuated, a transversely reciprocable die headhaving dies corresponding to the keys, a: yielding abutment on the die head adapted to coact with the other side of a locking-key lever, a tripping lever pivotally mounted on the abutment, a yielding connection between the tripping lever and block, a universal bar movable by the tripping lever, a clutch released by the universal bar, mechanism for operating the dies actuated by the clutch, and means for releasing the key lever following the embossing operation.

.35. The combination of a key operated member, a carriage shiftable transversely of said member, a cushioned abutment movable with the carriage and adapted to engage member, a block movable with the carriage, means for holding said block normally in position to clear the key operated member, and meansadapted to engage the key operated member and operating to force the block under spring pressure intoposition to engage the key operated member.

36. The combination of a keyboard having key levers, a shiftable latch carriage, an abutment on the carriage adapted to engage an actuated key lever, a spring holding said abutment normally in position whereby it may yield when so engaged, a normally elevated locking block vertically slidab'le in the latch frame. and adaptedto travel over an actuated key lever, and mechanism for positively lowering the locking, block on the far side of the key lever.

37. The combination ofa keyboard having key levers, a shiftable latch carriage, a'n abutment on the carriage adapted to engage an actuated key lever, a normally idle locking bar slida'ble in the latch frame and adapted to travel over the key lever, mechanism for positively moving'the lockingblock into position toengage the far side of the key lever, a clutch mechanism whereby the described movementof the locking-block is accompanied by the release of the clutch, and mechanism for restoring the locking block to its normal idle position.

38. Thecombinationof an actuatablememher, a: carriage shiftable transversely thereof, two abutments bodily sbiftable withthe carriage and relatively'movable with reference thereto, a coin-paratively heavy. spring opposing such relative movement of one abutment, a comparatively light spring opposing such relative movement of -the other abutment, each abutment being adapted to engage one sideofa key actuated member, a locking member normally free from said actuable member but adapted-to be moved to engage its other side, and means whereby the operation of theabutment controlled by the light spring results in the movement of the locking member into locking position.

39. The combination of an actuatable member, a carriage shiftable transversely thereof, two abutments bodily sli-iftable with the carriage and each relatively movable with reference thereto, a comparatively heavy spring opposing suchmovement of one abutment, a comparativel light spring opposing such movementof t e other abutment, each abutment being adapted-=to engage the same stopping surface of the actuatable member, a normally disconnected power, and mechanism whereby themovement of the abutment controlled by the light spring results in the application of the power.

40. The combination of a key actuated member, a carriage shiftable transversely thereof, two abut-meets shiftab'le by the carriage and movable relatively thereto, a comparatively heavy springopposing such movement of one abutment, a comparatively light spring opposing such movement ofthe other abutment, each abutmentbeing-adapted to engage a key actuated member, a locking member normally free from thekey actuated member but adapted to be moved to engage it, a clutch controlling a normally disconnected power, and mechanism whereby the movement ofthe abutmentcontrolled by the lightspringresults in the release of the clutchand in the movement of the looking member into locking position.

41. The combination of a keyboard having a set of'keys'with key levers, a carriage shiftab'le transversely thereof, a latchpawl shiftable with the carriage, twoabutments on the latch frame each'movable-thereon, a comparatively heavy spring opposing such movement of one abutment, a comparatively light spring opposing such movement of the other abutment, each abutment being adapted to engage one side of an actut-ed key lever, a locking member normally free from such key lever but adapted to be moved to engage its other side, aclutch controlling a normally disconnected power, a universal bar for rela'sing the clutch, and mechanism whereby the movement of the abutment controlled by the light spring results in the actuation of the universal bar, and means whereby the operation of the same abutment results in the movement of the locking member into locking position.

42. The combination of a key actuated member, a carriage shiftable transversely thereof, a tripping device movable with the carriage and adapted to engage said member, a lockingdevice adapted to coaet with the same member, and means for moving the locking device under the control of the tripping device.

-13. The combination of a key actuated member, a carriage shiftable with reference thereto, a tripping device movable with the carriage and adapted to engage said member, a locking device adapted to engage said member, a spring engaging said locking device, and means whereby the movement of the tripping device constrains said spring.

44. The combination of a keyboard having key actuated members, a carriage shiftable with reference thereto, a tripping member on the carriage adapted to coact with one side of a key actuated member, a locking member on the carriage adapted to coact with the opposite side of said key actuated member, and means for moving the locking device under the control of the tripping device.

45. The combination of a keyboard having key levers, a carriage shiftable transversely of the key levers, a tripping member on the carriage adapted to coact with one side of an actuated key lever, a locking block on the carriage adapted to mad; with the other side of the actuated key lever, a spring adapted to be constrained to press said block toward the key lever and means whereby the movement of the tripping de vice constrains the spring.

46. The combination of a keyboard having key levers divided into two banks, a transversely shiftable carriage, a pair of tripping members movable with the carriage and each adapted to coact with an actuated key lever, a pair of locking members also movable with the carriage and adapted to coaet with the same key levers respec tively, and means whereby the tripping members control the locking members.

In testimony whereof, I hereunto alhx my signature.

ALBERT H. BATES. 

